Chapter One
... resources and provides the base upon which application programs can be used or written A server-based network is centralized where security and maintenance are handled by the system administrator and all systems rely on the server; a peer-to-peer network is decentralized where security and maintenan ...
... resources and provides the base upon which application programs can be used or written A server-based network is centralized where security and maintenance are handled by the system administrator and all systems rely on the server; a peer-to-peer network is decentralized where security and maintenan ...
CUSTOMER_CODE SMUDE DIVISION_CODE SMUDE
... system and process control. Next is the set of libraries. On top are the applications. The user has access to the libraries and to the applications. These two components are what many users think of as UNIX, because together they constitute the UNIX interface. The part of UNIX that manages the hardw ...
... system and process control. Next is the set of libraries. On top are the applications. The user has access to the libraries and to the applications. These two components are what many users think of as UNIX, because together they constitute the UNIX interface. The part of UNIX that manages the hardw ...
UNIX Software Tools
... an email system) the software on the local host is the client and the software on the remote host is the server. In a X-Windows system this is reversed. The X-Windows server is on your local machine. It provides the following services: keyboard input, mouse, procedures for drawing on the screen, ...
... an email system) the software on the local host is the client and the software on the remote host is the server. In a X-Windows system this is reversed. The X-Windows server is on your local machine. It provides the following services: keyboard input, mouse, procedures for drawing on the screen, ...
OPERATING SYSTEMS:
... Interrupt transfers control to the interrupt service routine generally, through the interrupt vector, which contains the addresses of all the service routines. Interrupt architecture must save the address of the interrupted instruction. Incoming interrupts are disabled while another interrupt is bei ...
... Interrupt transfers control to the interrupt service routine generally, through the interrupt vector, which contains the addresses of all the service routines. Interrupt architecture must save the address of the interrupted instruction. Incoming interrupts are disabled while another interrupt is bei ...
Use Screen Sharing
... simply click on the application window that you want to share (green outline is added) and confirm your choice by clicking on “Share”. Mac OS X Yosemite (10.10+): After clicking on “Share window”, you are asked to grant Spreed access to your accessibility features in order to share your screen. Clic ...
... simply click on the application window that you want to share (green outline is added) and confirm your choice by clicking on “Share”. Mac OS X Yosemite (10.10+): After clicking on “Share window”, you are asked to grant Spreed access to your accessibility features in order to share your screen. Clic ...
The Evolution of the Unix Time
... visited each device in turn. Not surprisingly, there was no notion of mounting a removable disk pack, because the machine had only a single fixed-head disk. The operating system code that implemented this file system was a drastically simplified version of the present scheme. One important simplific ...
... visited each device in turn. Not surprisingly, there was no notion of mounting a removable disk pack, because the machine had only a single fixed-head disk. The operating system code that implemented this file system was a drastically simplified version of the present scheme. One important simplific ...
The Evolution of the Unix Time-sharing System
... were the DEC PDP-10 and the SDS (later Xerox) Sigma 7. The effort was frustrating, because our proposals were never clearly and finally turned down, but yet were certainly never accepted. Several times it seemed we were very near success. The final blow to this effort came when we presented an exqui ...
... were the DEC PDP-10 and the SDS (later Xerox) Sigma 7. The effort was frustrating, because our proposals were never clearly and finally turned down, but yet were certainly never accepted. Several times it seemed we were very near success. The final blow to this effort came when we presented an exqui ...
Computer-System Architecture Computer
... – Control passes through the interrupt vector to a service routine in the OS, and the mode bit is set to kernel mode. – The kernel verifies that the parameters are correct and legal, executes the request, and returns control to the instruction following the system call. ...
... – Control passes through the interrupt vector to a service routine in the OS, and the mode bit is set to kernel mode. – The kernel verifies that the parameters are correct and legal, executes the request, and returns control to the instruction following the system call. ...
COMP25111: Operating Systems - Lecture 4: Operating System
... Process Management: creation, deletion, CPU allocation, ... Memory Management: Allocate and deallocate memory space; Keep track of what parts of the memory are being used, ... Device (I/O) Management: read & write bytes File (and Secondary Storage) Management: ... Network Management: ... User interf ...
... Process Management: creation, deletion, CPU allocation, ... Memory Management: Allocate and deallocate memory space; Keep track of what parts of the memory are being used, ... Device (I/O) Management: read & write bytes File (and Secondary Storage) Management: ... Network Management: ... User interf ...
process management commands
... Four main advantages of threads are: 1. Responsiveness: Multithreading an interactive application may allow a program to continue running even if part of it is blocked or is performing a lengthy operation, thereby increasing responsiveness to the user. 2. Resource sharing: By default, threads share ...
... Four main advantages of threads are: 1. Responsiveness: Multithreading an interactive application may allow a program to continue running even if part of it is blocked or is performing a lengthy operation, thereby increasing responsiveness to the user. 2. Resource sharing: By default, threads share ...
Chapter 14
... • How to access MS-DOS emulators from other operating systems • How MS-DOS provided a foundation for early Microsoft Windows releases • The basics of command-driven systems and how to construct simple batch files • How one processor can be shared among multiple processes • The limitations of MS-DOS ...
... • How to access MS-DOS emulators from other operating systems • How MS-DOS provided a foundation for early Microsoft Windows releases • The basics of command-driven systems and how to construct simple batch files • How one processor can be shared among multiple processes • The limitations of MS-DOS ...
ppt
... • A process is an instance of a program being executed by a (real or virtual) processor – at any instant, there may be many processes running copies of the same program (e.g., an editor); each process is separate and (usually) independent – Linux: ps -auwwx to list all processes ...
... • A process is an instance of a program being executed by a (real or virtual) processor – at any instant, there may be many processes running copies of the same program (e.g., an editor); each process is separate and (usually) independent – Linux: ps -auwwx to list all processes ...
1. design principle
... driven shells that make it easier for programmers to use. The shell function remains the same it acts as an interpreter between user and computer. The shell also provides the functionality “pipes” where by a number of commands can be linked together by user. Tools and Applications: There are hundred ...
... driven shells that make it easier for programmers to use. The shell function remains the same it acts as an interpreter between user and computer. The shell also provides the functionality “pipes” where by a number of commands can be linked together by user. Tools and Applications: There are hundred ...
process
... In order to avoid conflicts due to the usage of I/O devices, it should be necessary to develop virtual devices, similar with the original devices, managed at a basic level of the OS. Theoretically, virtual machines should run only in the user space. Thus, the virtual machine should run its own v ...
... In order to avoid conflicts due to the usage of I/O devices, it should be necessary to develop virtual devices, similar with the original devices, managed at a basic level of the OS. Theoretically, virtual machines should run only in the user space. Thus, the virtual machine should run its own v ...
File - You have to dream before your dreams can come
... The "brain" of the computer is the CPU. It brings instructions from memory and carries out them. The fundamental cycle of every CPU is to bring the first instruction from memory, interpret it to decide its type and operands, execute it, and then bring, decode, and carry out following instructions. ...
... The "brain" of the computer is the CPU. It brings instructions from memory and carries out them. The fundamental cycle of every CPU is to bring the first instruction from memory, interpret it to decide its type and operands, execute it, and then bring, decode, and carry out following instructions. ...
Module 3: Operating
... – Systems programs – The kernel ∗ Consists of everything below the system-call interface and above the physical hardware ∗ Provides the file system, CPU scheduling, memory management, and other operating-system functions; a large number of functions for one level. ...
... – Systems programs – The kernel ∗ Consists of everything below the system-call interface and above the physical hardware ∗ Provides the file system, CPU scheduling, memory management, and other operating-system functions; a large number of functions for one level. ...
Lecture-2
... conclusion. It treats hardware and the operating system kernel as though they were all hardware A virtual machine provides an interface identical to the underlying bare hardware The operating system creates the illusion of multiple processes, each executing on its own processor with its own (vir ...
... conclusion. It treats hardware and the operating system kernel as though they were all hardware A virtual machine provides an interface identical to the underlying bare hardware The operating system creates the illusion of multiple processes, each executing on its own processor with its own (vir ...
Chapter 1
... like $HOME/bin • Call the dba_setup file from a startup file such as .bashrc • For example, place this code in .bashrc . $HOME/bin/dba_setup ...
... like $HOME/bin • Call the dba_setup file from a startup file such as .bashrc • For example, place this code in .bashrc . $HOME/bin/dba_setup ...
Modern Trends Used In Operating Systems For High Speed
... for processing it at a later point in time. Spooling was the first and the simplest of multi programming system. [8] Operating system uses a circular or a cyclic buffer for the implementing spooling. An example of spooling is when a thread of the process generates to be printed on a slow output devi ...
... for processing it at a later point in time. Spooling was the first and the simplest of multi programming system. [8] Operating system uses a circular or a cyclic buffer for the implementing spooling. An example of spooling is when a thread of the process generates to be printed on a slow output devi ...
CSc 352: Systems Programming & Unix
... lists the files in a directory one screenful at a time How this works: • ls writes its output to its stdout • more’s input stream defaults to its stdin • the pipe connects ls’s stdout to more’s stdin • the piped commands run “in parallel” ...
... lists the files in a directory one screenful at a time How this works: • ls writes its output to its stdout • more’s input stream defaults to its stdin • the pipe connects ls’s stdout to more’s stdin • the piped commands run “in parallel” ...
View
... Apple Mac OS X is “Aqua” GUI interface with UNIX kernel underneath and shells available ...
... Apple Mac OS X is “Aqua” GUI interface with UNIX kernel underneath and shells available ...
Applications, Address Spaces, and Processes
... copies the parent’s address space into the child’s starts a new thread of control in the child’s address space parent and child are equivalent -- almost • in parent, fork() returns a non-zero integer • in child, fork() returns a zero. • difference allows parent and child to distinguish ...
... copies the parent’s address space into the child’s starts a new thread of control in the child’s address space parent and child are equivalent -- almost • in parent, fork() returns a non-zero integer • in child, fork() returns a zero. • difference allows parent and child to distinguish ...
Blackfin VisualDSP++
... which performs process rescheduling if need. I.e. if there was an event arisen in the ISR, which must be handled by the certain process, the process will be moved to ready to run state and context switch executed (if possible). The port Blackfin/VisuaDSP++ does not support separate stack for interru ...
... which performs process rescheduling if need. I.e. if there was an event arisen in the ISR, which must be handled by the certain process, the process will be moved to ready to run state and context switch executed (if possible). The port Blackfin/VisuaDSP++ does not support separate stack for interru ...
Input/Output
... – For simplicity and to avoid errors – Uniform treatment of all devices – Due to the diversity of the devices, only layered system can offer this uniformity – Layers depend on lower layers for specific services, implement general set of services ...
... – For simplicity and to avoid errors – Uniform treatment of all devices – Due to the diversity of the devices, only layered system can offer this uniformity – Layers depend on lower layers for specific services, implement general set of services ...
Acorn MOS
Acorn's Machine Operating System (MOS) or OS was a computer operating system used in the Acorn BBC computer range. It included support for four-channel sound and graphics, file system abstraction, and digital and analogue I/O including a daisy-chained fast expansion bus. The implementation was single-tasking, monolithic and non-reentrant.Versions 0.10 to 1.20 were used on the BBC Micro, version 1.00 on the Electron, version 2 was used on the B+, and versions 3 to 5 were used in the BBC Master Series range.The final BBC computer, the BBC A3000, was 32-bit and ran RISC OS. Its operating system used portions of the Acorn MOS architecture and shared a number of characteristics (commands, VDU system) with the earlier 8-bit MOS.Versions 0 and 1 of the MOS were 16KiB in size, written in 6502 machine code, and held in ROM on the motherboard. The upper quarter of the 16-bit address space (0xC000 to 0xFFFF) is reserved for its ROM code and I/O space.Versions 2 to 5 were still restricted to a 16KiB address space but managed to hold more code and hence more complex routines, partly because of the alternative 65C102 CPU with its denser instruction set plus the careful use of paging.